xref: /openbmc/linux/arch/mips/kernel/reset.c (revision f3539c12)
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2001, 06 by Ralf Baechle (ralf@linux-mips.org)
7  * Copyright (C) 2001 MIPS Technologies, Inc.
8  */
9 #include <linux/kernel.h>
10 #include <linux/export.h>
11 #include <linux/pm.h>
12 #include <linux/types.h>
13 #include <linux/reboot.h>
14 #include <linux/delay.h>
15 
16 #include <asm/reboot.h>
17 
18 /*
19  * Urgs ...  Too many MIPS machines to handle this in a generic way.
20  * So handle all using function pointers to machine specific
21  * functions.
22  */
23 void (*_machine_restart)(char *command);
24 void (*_machine_halt)(void);
25 void (*pm_power_off)(void);
26 
27 EXPORT_SYMBOL(pm_power_off);
28 
29 void machine_restart(char *command)
30 {
31 	if (_machine_restart)
32 		_machine_restart(command);
33 
34 #ifdef CONFIG_SMP
35 	preempt_disable();
36 	smp_send_stop();
37 #endif
38 	do_kernel_restart(command);
39 	mdelay(1000);
40 	pr_emerg("Reboot failed -- System halted\n");
41 	local_irq_disable();
42 	while (1);
43 }
44 
45 void machine_halt(void)
46 {
47 	if (_machine_halt)
48 		_machine_halt();
49 
50 #ifdef CONFIG_SMP
51 	preempt_disable();
52 	smp_send_stop();
53 #endif
54 	local_irq_disable();
55 	while (1);
56 }
57 
58 void machine_power_off(void)
59 {
60 	if (pm_power_off)
61 		pm_power_off();
62 
63 #ifdef CONFIG_SMP
64 	preempt_disable();
65 	smp_send_stop();
66 #endif
67 	local_irq_disable();
68 	while (1);
69 }
70